Find the Sum or Difference $$( - 9 a + 5 b ) ( - 8 a + 3 b )$$

question 423

Multiple Choice

Find the sum or difference.
- $$( - 9 a + 5 b ) ( - 8 a + 3 b )$$

• A) \(72 a ^ { 2 } + 67 a b + 15 b ^ { 2 }\)
• B) \(72 a ^ { 2 } - 67 a b + 15 b ^ { 2 }\)
• C) \(72 a ^ { 2 } + 15 b ^ { 2 }\)
• D) \(72 a ^ { 2 } + 13 a b + 15 b ^ { 2 }\)

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